J4 ›› 2005, Vol. 23 ›› Issue (3): 34-38.

• 论文 • 上一篇    下一篇

甘肃省永登地区一次强单体冰雹过程分析

渠永兴1孙旭映1冀兰芝2韩玲3
  

  1. 1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020;2.兰州中心气象台,甘肃兰州730020;3.榆中县气象局,甘肃兰州730100
  • 收稿日期:2005-04-19 修回日期:2005-07-22 出版日期:2005-09-30 发布日期:2005-09-30
  • 作者简介:渠永兴(19 51-) ,男,山西祁县人,工程师,主要从事人工影响天气的研究工作.E-mail: quyongx@ 163.com
  • 基金资助:

    甘肃省人工增雨防雹作业体系工程建设科技开发第三批项目’‘测雨雷达现场指挥作业研究”和科技部2002年社会公益研究项目’‘西北地区人工防雹消雹技术”( 2002D工1310046)等资助

Analysis on a Strong Single Hail Occurred in Yongdeng County of Gansu Province

 QU Yong-Xin1, SUN Xu-Yang1, JI Lan-Zhi2, HAN Ling3   

  1. (1 .Kcy laboratory of Arid Climatic Change and Reducing Disaster of Uansu Province,
          Lanzhou Institute of Arid Meteorology, CMA,Lanzhou 730020,China;
          2.  Lanzhou Central Meteorological <)bscrvatory, Lanzhou 730020,China;
    3.  Yuzhong County Meteorological Service of Uansu Province,  Lanzhou 7301()(),China)
  • Received:2005-04-19 Revised:2005-07-22 Online:2005-09-30 Published:2005-09-30

摘要:

根据2003年7月8日发生在甘肃省永登县境内的一次强单体冰雹过程,从天气学背景、雷达回波的演变特征出发,分析了该过程回波高度和含水量、高度和强度的跃增变化以及强中一体特殊的结构特征。分析结果表明,垂直剖面上强反射率区的范围及伸展高度对雹云的发展有重要作用。强反
射率区对应着云中含水量集中区域,只有含水量累积区位于云中过冷区中时才利于冰雹的生长;一旦回波出现55dBZ并高度达到4 km以上,降雹随即产生;强单体雹暴是一种发展非常强烈,有着特殊结构的强雷暴上述结果对冰雹预警有重要意义.

关键词: 冰雹, 强单体, 过程分析, 甘肃永登

Abstract:

According to the synoptic background and the evolution characteristics of radar echoes of a strong single hail event occurred in Yongdeng county of Uansu Province on July 8,2003,the jumping change of echo height,intensity and liquid water content,and the special structure features of the strong single hail were analyzed in this paper. 'hhc results show that the range and extension height of strong reflectivity area on vertical section arc important to hailstorm development.  While the strong reflectivity area is corresponding to bunbant  watea area In cloud,and only water content accumulating area being in the cooled 4km,region in the cloud can t0  abundant he benefit to hail development.  <)nec the echo intensity reached 55 dBz and its height was above hail falls immediately. 'hhe strong single hail with special structure developed very strongly.  Above conclusions
arc nificant to hail monitoring and prcwarning.

Key words: hail, a strong single hail, process analysis, Yongdeng county in Uansu province
 

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